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Fouling of ultrafiltration membranes during isolation of hemicelluloses in the forest industry

Persson, Tobias LU and Jönsson, Ann-Sofi LU (2009) In Scholarly Research Exchange
Abstract
The process streams in the forest industry contain a large amount of hemicelluloses that today ends up in the wastewater. This is

an unfortunate loss of a renewable raw material. The hemicelluloses can be isolated from the process stream by using membrane

filtration in a process that produces purified water as a by-product, thereby facilitating increased recirculation. However, process

streams from the forest industry contain both aromatic compounds and inorganic ions that are known to cause fouling of the

membranes. Thus, the most suitable membrane and pretreatment from a cost-efficient point of view must be applied to avoid

fouling and life-time shortening of the membranes during operation. In... (More)
The process streams in the forest industry contain a large amount of hemicelluloses that today ends up in the wastewater. This is

an unfortunate loss of a renewable raw material. The hemicelluloses can be isolated from the process stream by using membrane

filtration in a process that produces purified water as a by-product, thereby facilitating increased recirculation. However, process

streams from the forest industry contain both aromatic compounds and inorganic ions that are known to cause fouling of the

membranes. Thus, the most suitable membrane and pretreatment from a cost-efficient point of view must be applied to avoid

fouling and life-time shortening of the membranes during operation. In the present investigation, fouling during ultrafiltration

of a process stream from the production of Masonite was studied. The fouling of a hydrophilic membrane made of regenerated

cellulose was less severe than the fouling of hydrophobic membranes made of polyether sulphone and a composite fluoropolymer.

Pretreatment of the wastewater with activated carbon resulted in higher flux and less fouling of both hydrophilic and hydrophobic

membranes. Lowering the pH of the wastewater led to less severe fouling of the regenerated cellulose membrane, but lower flux of

the composite fluoropolymer membrane. (Less)
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Scholarly Research Exchange
external identifiers
  • Scopus:65349178176
DOI
10.3814/2009/624012
language
English
LU publication?
yes
id
4def248d-6bd4-463e-a46c-d7bc3674d5a9 (old id 1488403)
date added to LUP
2009-10-23 12:43:31
date last changed
2016-10-13 04:53:07
@misc{4def248d-6bd4-463e-a46c-d7bc3674d5a9,
  abstract     = {The process streams in the forest industry contain a large amount of hemicelluloses that today ends up in the wastewater. This is<br/><br>
an unfortunate loss of a renewable raw material. The hemicelluloses can be isolated from the process stream by using membrane<br/><br>
filtration in a process that produces purified water as a by-product, thereby facilitating increased recirculation. However, process<br/><br>
streams from the forest industry contain both aromatic compounds and inorganic ions that are known to cause fouling of the<br/><br>
membranes. Thus, the most suitable membrane and pretreatment from a cost-efficient point of view must be applied to avoid<br/><br>
fouling and life-time shortening of the membranes during operation. In the present investigation, fouling during ultrafiltration<br/><br>
of a process stream from the production of Masonite was studied. The fouling of a hydrophilic membrane made of regenerated<br/><br>
cellulose was less severe than the fouling of hydrophobic membranes made of polyether sulphone and a composite fluoropolymer.<br/><br>
Pretreatment of the wastewater with activated carbon resulted in higher flux and less fouling of both hydrophilic and hydrophobic<br/><br>
membranes. Lowering the pH of the wastewater led to less severe fouling of the regenerated cellulose membrane, but lower flux of<br/><br>
the composite fluoropolymer membrane.},
  author       = {Persson, Tobias and Jönsson, Ann-Sofi},
  language     = {eng},
  series       = {Scholarly Research Exchange},
  title        = {Fouling of ultrafiltration membranes during isolation of hemicelluloses in the forest industry},
  url          = {http://dx.doi.org/10.3814/2009/624012},
  year         = {2009},
}